What is a computer? A computer is an electronic device capable of processing data according to programmed instructions. It consists of hardware components like the central processing unit (CPU), memory, storage, input/output devices, and software. Computers can perform various tasks, such as calculations, data processing, communication, and running software applications.
What is an operating system? An operating system (OS) is software that acts as an intermediary between computer hardware and software applications. It manages hardware resources, provides services to software programs, and enables users to interact with the computer. The OS controls tasks like memory management, file system operations, user interface, and process scheduling, allowing multiple applications to run smoothly on a single machine.
What is an application? An application, often referred to as software or an app, is a computer program designed to perform specific tasks or functions for the user. Applications can range from simple utilities like calculators and text editors to complex software like web browsers, video editors, and games. They enable users to accomplish various activities on a computer or other devices.
Open source vs closed source software: Open source software refers to software whose source code is openly available to the public, allowing anyone to view, modify, and distribute it. This encourages collaboration, transparency, and community-driven development. Examples of open source software include the Linux operating system and the Mozilla Firefox web browser.
Closed source software, also known as proprietary software, is software whose source code is not openly available. The company or individual that develops the software retains exclusive control over its code, distribution, and modifications. Users typically need a license to use and customize closed source software. Examples of closed source software include Microsoft Windows and Adobe Photoshop.